Cambridge's high number of families living in rented accommodation could prove decisive in deciding the city's MP, analysis by the Trinity Mirror data unit shows.

There are significant correlations between the proportion of a seat made up of a particular demographic group and the size of the vote for a particular party.

So which are the groups of people whose presence in a constituency leads to a bigger vote for Labour, Conservatives or the Liberal Democrats?

Daniel Zeichner, Labour candidate

Labour - renting family living

Labour tends to benefit when a constituency has a higher proportion of areas the ONS describe as predominantly “rented family living”.

People living in these types of areas are more likely to live in terrace houses or possibly flats.

They tend to be a mix of UK-born families who socially rent and EU migrants who rent privately. Again, these areas tend to be found between urban centres and suburbia and to be more ethnically mixed.

Seats where large amounts of this “rented family living” may helping the Labour vote are Croydon North, where 17 per cent is classed by the ONS in this way and Labour have a majority of 21,364.

In Manchester's Gorton area, 25 per cent of the seat is classed as “rented family living” and Labour is defending a majority of 24,079.

More than a quarter of the Cambridge seat (26 per cent) is classified as rented family living, and with a Labour majority of 599, Labour are likely to be hoping people in this group will be more likely to back them and help them hang onto the seat.

When it comes to voting Labour, there is also a strong correlation with the proportion of a constituency made up of areas classed by the Office for National Statistics as “challenged Asian terraces”.

People living in these types of areas, which are usually found in the areas between urban centres and suburbia, are more likely to be made up of people with school-age children, who commute to work in transport and admin jobs by public transport.

They are more likely to be a much more ethnically mixed group than the UK population generally - particularly people from the Pakistani ethnic group.

And they are more likely to work in the accommodation and food industries or be unemployed, and to live in terraced houses where overcrowding is more prevalent.

East Ham in London is a good example of how this type of area might be boosting the Labour vote. Some 66 per cent of the constituency is made up of areas classed as “challenged Asian terraces” and Labour holds a majority of 34,252.

In Ilford South, 65 per cent of the seat is classed as “challenged Asian terraces” and Labour has a majority of 19,777.

The third demographic group which has a strong correlation with a high Labour vote is described by the ONS as “aspirational techies”.

This group tends to be ethnically mixed, younger adults with no children, or older adults with non-dependent children. They tend to be more likely to live in semi-detached homes and terraces and more likely to be renting privately.

They are more likely to work in IT and take public transport to work.

Camberwell and Peckham is an example of the kind of seat where a high proportion of the constituency being classed as “aspirational techies” may be boosting the Labour vote, with 35 per cent of the seat classed this way and Labour holding a majority of 25,824.

Dr John Hayward, Conservative candidate

Conservatives - urban professionals and families, as well as rural tenants

A strong correlation when it comes to voting Conservative is with the proportion of a constituency made up of what the ONS classes as “urban professionals and families”.

People living in these types of areas are more likely to be part of families with children aged 14 and under.

They are more likely to be an ethnically mixed group than the UK population generally, more likely to work in IT and finance.

They live in detached and semi-detached houses, or privately rented flats and terraces.

Examples of seats where “urban professionals and families” may be helping boost the Conservative vote are Esher and Walton, where 28 per cent of the seat is made up of areas classed in this way and the Tories hold a majority of 28,616.

In Hereford and Stortford, 30 per cent of the area are “urban professionals and families” and the Conservatives won in 2015 by 21,509 votes.

The bigger the proportion of a constituency made up of what the ONS calls “ageing urban living”, the more votes the Conservatives are likely to get.

Unsurprisingly, people living in these types of areas are more likely to be aged 65 and over.

They may live in care homes or they may be more likely to live in flats and terraces. Workers in these areas are more likely to take the bus to work and to work in IT and finance.

Seats where ageing urban living may helping the Tory vote are South West Surrey, 37 per cent of the seat is made up of areas classed in this way with a Tory majority of 28,556, and Beaconsfield, 31 per cent ageing urban living with a majority of 26,311.

The third group where there is a strong correlation with high Tory support are what the ONS describes as “rural tenants”.

This group tends to be older, married and well-educated and live in areas that are less ethnically mixed. They are more likely to live in semi-detached homes, terraces and flats and to be more likely to be in social rented homes. Although they live in rural areas they are less likely to be working in agriculture than others locally.

The Cotswolds is an example of the kind of seat where a high proportion of the constituency being classed as rural tenants may be boosting the Tory vote. Some 35 per cent of the seat is classed this way and the Conservatives have a majority of 21,477.

Dr Julian Huppert, Liberal Democrat candidate

Liberal Democrats - students around campus

While the U-turn on tuition fees after the 2010 election was seen as costing the Lib Dems their student vote in 2015, there is still a correlation between the proportion of a seat classified by the ONS as predominantly “students around campus” and the size of the Lib Dem vote.

These areas are more likely to contain full-time students living in halls, as well as people living in terraces. Private renting is also more common. Workers in these areas tend to be employed in accommodation and food service industries.

Leeds North West is an example of the kind of seat where a high proportion of the constituency being classed as “students around campus” may be boosting the Lib Dem vote, with 24% of the seat classed this way and the Lib Dems having a majority of 2,907.

The Liberal Democrats share similar voting correlations with the Conservatives, with areas with higher proportions of “ageing urban living” and “urban professionals and families” also more likely to vote Lib Dem.

That should make seats like Twickenham - where 37 per cent of areas are classed as “urban professionals and families” and 14 per cent as “ageing urban living” - interesting.

Nick Clegg’s current seat of Sheffield Hallam, which he is defending with a majority of 2,523, contains 18 per cent “ageing urban living” and 14 per cent “urban professionals and families”.

Using Census data, the Office for National Statistics looks at 60 different bits of information about the people who live in each neighbourhood to put each area into one of 26 groupings that best describe the area.

Among the things taken into consideration are age, ethnicity, the type of home people live in, education and employment - all to find the areas where you are more likely to find young families living in terraces, or tech workers, or retired people in semi-detached homes.